package com.zm.springmvc;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

//该类不需要加注解，Spring会自动扫描
//写法1
public class WebConfig implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        //加载 Spring 配置
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.register(AppConfig.class);

        //注册转发器Servlet
//        DispatcherServlet servlet = new DispatcherServlet(context);
//        ServletRegistration.Dynamic registration = servletContext.addServlet("app",servlet);

        MyDispatcherServlet servlet = new MyDispatcherServlet(context);
        ServletRegistration.Dynamic registration = servletContext.addServlet("app",servlet);

        //设置服务器在启动时加载 DispatcherServlet
        registration.setLoadOnStartup(1);
        //转发全部请求，必须配置响应地址为：/
        registration.addMapping("/");

    }
}
